1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66635e73193ba0ba644c3ba3d1a32a8ab95cc842a13926eccc83eb31ce097f7. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8a1e89f-939d-4abc-ae71-eca7a44b8bbc.json and https://artists.proofprofile.net/proofs/artist/a8a1e89f-939d-4abc-ae71-eca7a44b8bbc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Majestic Airs: Festive Music For Organ & Trumpet
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8e642e121019ddcd8672e1eb914a7d0f1c371d5e83d1baceb899a13bffd302. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRUF1010002.
Trumpet Voluntary, op. 6, no. 5: Voluntary
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec913729f1e16fea6ed07f2a68e7c134cda058c5cb37be19fd54753fd30c405c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRUF1010003.
Voluntary in C: Largo - from 10 Voluntaries for Organ or Harpsichord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ffdb13e8f0aa0e28a7c2352913622986cce50541e861a6a9c475a7c984aa1d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRUF1010006.
Voluntary in C: Voluntary - from 10 Voluntaries for Organ or Harpsichord
Tidings of Joy (from Christen, ätzet diesen Tag, BWV 63)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0259635de59b12e5fa553c3115f2b816f45eae7b0d87c40d01d8748046ee08b1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRUF1010010.
Vivace (adapted from Sonata for Violin and Basso Continuo, op. 1, no. 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43756ed2e7ea6647bb8c1f136e22c46c63b852dfca1829c7571b8d57de00f0f5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRUF1010014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495c421db91fa02d456f928c69aa3ad7b2b27b51e81807b80e89a2595147270d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRUF1010015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71d8997a7ab058a4d0bdf30e3c9a5ef7f2d6eefd84fd4ce11e41a028730e87a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRUF1010018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623253304a17768062af847dc3fe9c2a77065d96fcb45b05f6ab9332335d4522. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRUF1010019.